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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '871f66441059847f2d247d00b7944a4adf34f648f855d7c1b93438ab2bd51e8d' 
  AND token = 'tQNPWBS/A/VIGTV6k+kE5kuXjeyGEtGPaEoF2+AxyWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}